Title :
A 900-MHz/1.8-GHz CMOS transmitter for dual-band applications
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
fDate :
5/1/1999 12:00:00 AM
Abstract :
The design of a radio-frequency transmitter that can operate in two bands while employing a minimal number of external components entails many challenges at both the architecture and the circuit levels. This paper describes the design of a 900-MHz/1.8-GHz transmitter implemented in CMOS technology for dual-band applications. Configured as a two-step architecture, the circuit generates the first upconverted signal in quadrature form and subsequently performs single-sideband modulation to produce the output in two bands. Fabricated in a 0.6-μm digital CMOS technology, the transmitter exhibits unwanted spurs 40 dB below the carrier while drawing 75 mW from a 3-V supply
Keywords :
CMOS integrated circuits; UHF integrated circuits; minimum shift keying; modulators; radio transmitters; 0.6 micron; 1.8 GHz; 3 V; 75 mW; 900 MHz; CMOS transmitter; GMSK; dual-band applications; quadrature form; radio-frequency transmitter; single-sideband modulation; two-step architecture; upconverted signal; CMOS technology; Circuits; Dual band; Frequency shift keying; Frequency synthesizers; GSM; Radio frequency; Radio transmitters; Signal generators; Transceivers;
Journal_Title :
Solid-State Circuits, IEEE Journal of
